Q.3 A) Answer the following question in 2-3 sentences ( any 3)
1) What is a wedge? State example of wedges?
2) What is a complex machine ?
3) Write the two of magnet.
4) What is galaxy?
B) Give Scientific reasons for the following (any 3)
1) Machines hare to be maintained.
2) Cranes with magnets are used.
3) Jupiter is called the Story Planet.
4) Moon is a Satellite of the earth.
C) Complete the table of the magnet & their uses.
Uses
Sr.No
Magnets
llorseshoe Magnet
1
2
Used in Loudspeaker
Used in toys.
3
Bar Magnet
Answers
Answer:
A
1)The common examples of wedges that we use are knives, axes, chisels etc. Wedge can also be formed by using a number of inclined planes such that we get a pointed edge. The sloping surfaces will taper to form a very sharp pointed edge which can either split or pierce a material.
2)complex machine is a machine made up of two or more simple machines that make your work easier to do. There are six simple machines from which all complex machines are made. They include: The lever. The inclined plane.
3)A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet called Earth that is part of our solar system. ... A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems.